Safety attachment for gas-fixtures.



J. C. CASEY.

SAFETY ATTACHMENT FOR GAS FIXTURES.

APPLICATION FILED APR.24, 1915.

T. T 66, 1 1L 0. Patented Dec. 28,- 1915.

2 SHEETSSHEET I.

coummm I'LANOGRAPH cu. WASHINGTON, u. c.

J.-C. CASEY.

SAFETY ATTACHMENT FOR GAS FIXTURES.

APPLICATION men APR.24,'1915.

LIBQT 1. Patented M028, 1915,

2 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH cm. WASHINGTON. D. c.

PA I.

JOSEPH C. CASEY, OF PAOLI, PENNSYLVANIA.

SAFETY 'ATTACHMENT FOR GAS-FIXTURES.

Application filed April 24, 1915.

To all whom it may concern Be it known that I, JosrrH C. CASEY, a citizen of the United States. residing at Paoli, in the county of Chester and State of Pennsylvania, have invented new and useful Improvements in Safety Attachments for Gas-Fixtures, of which the following is a specification.

My invention relates to new and useful improvements in safety attachments for gas fixtures, and has for its object to provide an exceedingly simple and efective device of this character which may be attached to gas fixtures so that the gas will be shut off immediately should the light be extinguished in any manner thus preventing asphyxiation, and the possible loss of property by fires or explosions.

Another object of the invention is to provide a construct on which can be readily applied to a gas fixture of ordinary construction so that a person unfamiliar with gas fixtures may readily apply the same.

A still further object of the invention is to provide means for removing the bell out of alinement with the burner to permit the ready removal of the g obe or mantle often used in conjunction with the burner.

My invention is especially adapted for use with gas fixtures when a prepayment meter is installed so that the val e will be closed should the meter shut off the gas after the amount of gas paid for, has been used, so that when a coin is next dropped into the meter. no gas will escape from the burner.

With these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specificially designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same. I will describe the construction in detail, referring by numeral to the accompanying drawing forming a part of this application, in which Figure 1, is a side elevation of my improved safety attachment for gas fixtures, portions thereof being shown in section to clearly illustrate the construction, and showing the parts in the positions taken when the light is out. Fig. 2, is an end view of a portion of the attachment showing the construction of the guide. Fig. 3, is a section at the line 83 of Fig. 1. Fig. 4, is a rear Specification of Letters Patent.

Patented Dec. 28, 1915.

Serial No. 23,687.

view of a slightly modified form of my invention showing the parts in their positions when a burner is lighted, the gas fixture being shown in section and the globe removed. and Fig. 5, is a side elevation thereof, partly in section to clearly illustrate the construction with the globe thereon.

In carrying out my invention as illustrated in Figs. 1 to- 8 inclusive, :2 represents the pipe leading from the supply pipes within the walls of the building, and to the end of this is attached the T coupling 3, one of the outlets thereof having threaded therein a valve casing 4-, carrying the valve 5 which is operated by the lever 6, having mounted on its free end a weight 7, one end of which carries a rubber buffer 8, adapted to prevent said weight from injuring the pipe 2, when said we ght drops to close the valve 5.

To some suitable portion of the weight is secured a chain 9. having an eye 10. adapted to co-act with another portion of the device for holding the weight in its raised posi tion as will be hereinafter described.

To the valve ca sing t is secured a burner 11 having the ordinary stop cock and key 12 so that the supply of gas to the burner may be regulated. As here shown the burner is provided with a mantle 13 and a globe 14, but of course it will be understood that this is unnecessary as the ordinary burner and tip may be used just as advantageously.

To the other outlet of the T coupling 3. is secured a tube 15. the lower end of which is closed in any suitable manner as at 16. In the upper end of this tube is mounted a rod 18 having two slots 19 and 20, at right angles to one another, the slot 20 being of greater length or deeper than the slot 19.

The tube 18 is held in its position within the tube 15 by a screw 21 or its equivalent which also holds the trigger bracket 22 upon the exterior of the tube 15, said trigger bracket having a slot 23 therein which guides and limits the movements of the trigger 24, the latter passing through said slot and being carried by a dog 25 pivoted at 26 to the trigger bracket 22 and the free end of said dog is provided with a projection or hook 27 which registers with the eye 10 of the chain 9, when the weight is in its raised position and the valve 5 is open.

Slidably mounted upon the rod 18 is a tube 28 which, carries the elbow 29, said elbow having secured to its rear wall a guide 30, the lower portion of which is provided lever 34.

with a slot 31, for the passage of the trigger 24 into the guide. From the elbow 29 leads a member 32 carrying an upright 33 to which is pivoted the swinging lever 34 as at 35. One end of this lever has pivoted thereto a needle 36 as at 37, said needle adapted to register with the guide 30 and engage the free end of the trigger 24 to hold said trigger in its raised position.

To the member 32 is secured the bell 38 open at its upper end as at 39 and said bell is further braced or held stationary by a bolt 40 which is secured to said bell and passes through the tube 28, and said bolt is adapted to register with the slot 20 in the rod 18 when the bell is in its normal posi-- tion above the burner, but when it is desired to remove the globe or mantle, the tube 28 is raised todisengage the bolt 40 from the slot 20 after which said tube 28 may be rotated a quarter of a turn and again moved downward bringing the bolt 40 into engage ment with the slot 19 thus removing the bell 38 out of alinement with the globe to permit the ready removal of the latter.

In the longitudinal center of the bell 38 is secured a plate 41 by means of the flanges 42 and this plate carries a bracket 43 to which is pivoted the lever 44 as at 45, one end of said lever having pivoted thereto one end of the connecting rod 46 as at 47 the opposite end of said connecting rod being pivoted at 48 to one end of the swinging To the opposite end of the lever 44 is pivoted to one end of the L shaped connecting member 49 as at 50 and the opposite end of said L shaped connecting member is attached to one end of theexpansion strip 51, the opposite end of the latter be ing attached as at 52 to the bell 38, the expansion strip preferablycomprises two dif ferent metals, the outer one 53 being of lower expansion metal and the inner one 54 of high expansion metal. These two strips being held together by rivets 55.

The operation of the device is as follows :The parts being in the positions as shown in Fig. 1, the trigger 24 is raised until its free end enters the guide 30 after which time the weight 7 is raised and the eye,10 of the chain 9 placed over the hook end 24 of the dog 25 thuspermitting the gas to flow to the burner. The stop-cock is then opened and the gas lighted, the heat from which will cause the expansion strip 51 to expand and as the tendency thereof is to spring out, the end of the lever 44, to which the ctnnecting member 49 is pivoted. will be drawn downward raising the opposite end, which motion will be imparted through the connecting'rod 46 to the swinging lever 34, lowering that end of said swinging lever which carries the needle 36 causing said needle to pass across the slot 31 in the guide 30 thereby retaining the trigger 34 in its raised position. If, for any reason, the flame is extinguished, the expansion strip will at once contract and reverse the movements herein described causing the trigger 24 to be released at which time the weight 7 will draw the dog 25 downward releasing the chain from said dog and permitting the weight 7 to fall to the position shown in Fig. l, which movementwill close the valve 5 and shut oil the supply of gas to the burner.

In Figs. 4 and 5, I have shown a slightly modified form of my invention, all the essential features of which are the same, but illus trates a construction which may be readily applied to a gas fixture. In this form of the invention, 5'? denotes the gas fixture provided with the ordinary stop-cock and key 56 for regulating the flow of gas to the burner.

To the end of the fixture which ordinarily carries the burner, is secured a T coupling 3 which in this case has the alined openings in the vertical position and the burner 11.

which is carried by the valve casing 4, does not have a stop-cock.

In practice, a person desiring to place a safety attachment illustrated in Figs. 4 and 5, in position, will only remove the burner frcm the gas fixture 57 and screw the at- 9 tachment on the fixture in place of the burner after which it will be ready for use.

Of course I do not wish to be limited to the exact details of construction as here shown as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my inven tion, what I claim as new and useful, is

1. In a device of the character described, a bell, means for holding said bell above the gas burner, a plate mounted within the bell, a lever carried by said plate, an expansion strip, one end of which is secured to the bell, means for attaching the opposite end thereof to the lever, a swinging lever, means for connecting the first named lever and said swinging lever, a needle carried by one end of said swinging lever, a trigger, the free end of which is adapted to be engaged by the needle for holding the former in its raised position, a valve interposed between the burner and the supply pipes, a lever carried by said valve, a weight mounted on the free end of said lever and means carried by said weight adapted to engage a portion of the trigger for holding said weight in its raised position.

2. In combination with a gas fixture, a safety attachment therefor, comprising a T coupling, a valve carried thereby, a lever secured to said valve, a weight mounted on the free end of said lever, a chain secured to said weight, said chain provided with an eye, a burner leading from the valve, a ver tical tube carried by the T coupling and closed to prevent the escape of gas therethrough, a member extending horizontally from the upper end of said tube, a bell suspended from said member, a plate disposed across the interior of said bell, a lever, means for pivoting the same to the plate, an expansion strip having one end secured to the bell and the opposite end connected with the lever, an upright carried by the member, a swinging lever pivoted thereto, means for connecting one end of said swinging lever to the lever carried by the plate, a trigger bracket carried by the vertical tube, a trigger pivoted thereto adapted to receive the eye carried by the chain for holding the weight in its raised position, and means carried by the swinging lever for engagement with the free end of the trigger for holding the latter in its raised position.

3. In a safety attachment for gas fixtures, a 'l' connection adapted to be secured to a supply pipe, a valve casing carrying a valve projecting from the T connection, a burner carried by the valve casing, a tube closed at one end proiecting from the T coupling, a rod mounted in the upper end of the tube, said rod having two different depth slots at right angles to one another, another tube slidably mounted upon said rod, an elbow carrying a guide, a member projecting from said elbow, a bell suspended from said member, a bolt attached to the bell and passing through the second named tube, a portion of said bolt adapted to engage either of the slots in the rod, a weighted lever secured to the valve for normally closing the latter, a pivoted trigger, means co-actmg with said trigger for holding the weighted lever in its raised position, a swinging lever, means carried by one end thereof for holding the trigger in its raised position, means mounted within the bell for imparting motion to the swinging lever, and means carried by the bell for operating the last named means according to the changes of temperature.

4-. In a safety attachment for gas fixtures, a bell, means for suspending said bell from a gas fixture, a burner mounted in alinement with said bell, a valve interposed between said burner and the supply pipe, a weighted lever for normally closing said valve, a trigger bracket having a slot therein secured to the suspension means, a dog pivoted to said trigger bracket, means carried by the weighted lever co-acting with said dog for holding said lever in its raised position, a trigger carried by said dog passing through the slot in the trigger bracket, an upright carried by the suspension means, a swinging lever pivoted to said upright, a needle pivoted to one end of the swinging lever adapted to co-act with the trigger for holding the same in its raised position, a connecting rod carried by the opposite end of the swinging lever, an expansion strip located within the bell, and means for imparting motion from the free end of said expansion strip to the connecting lever, when said expansion strip is acted upon by the changes of temperature.

5. In a safety attachment for gas fixtures, a bell, means for suspending said bell from a gas fixture, a burner mounted in alinement with said bell, a valve interposed between said burner and the supply pipe, a weighted lever for normally closing said valve, a trigger bracket carried by the suspension means, a dog pivoted to the bracket and having a hook at one end thereof, means carried by the weighted lever for engagement with the hooked end of the dog to hold the weighted lever in its raised position, a trigger carried by said dog, a guide having a slot in its lower portion carried by the suspension means, the trigger adapted to pass into the guide through the slot, an up ri ht carried by the suspension means, a swinging lever pivoted thereto, a needle carried by one end of the swinging lever adapted to pass into the guide, and hold the trigger in its raised position, a connecting rod pivoted to the opposite end of the swinging lever and passing into the bell, an expansion strip located within the bell and having one end secured thereto and means for transmitting motion from the free end of the expansion strip to the connecting rod when said expansion strip is acted upon by the changes of temperature.

In testimony whereof, I have hereunto affixed my signature in the presence of two subscribing witnesses.

J OS. 0. CASEY.

Witnesses BAPTIST BINSFELD, M. TOBIAS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

